Portable stall jack



FIG. 1 is a front, left and top perspective view of a portable stall jack showing my new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side enlarged elevational view with portions broken away. 

CLAIM The ornamental design for a portable stall jack, as shown and described. 